Akira AJISAKA created YARN-3006: ----------------------------------- Summary: Improve the error message when attempting manual failover with auto-failover enabled Key: YARN-3006 URL: https://issues.apache.org/jira/browse/YARN-3006 Project: Hadoop YARN Issue Type: Improvement Affects Versions: 2.6.0 Reporter: Akira AJISAKA Assignee: Akira AJISAKA Priority: Minor
When executing manual failover with automatic failover enabled, UnsupportedOperationException is thrown. {code} # yarn rmadmin -failover rm1 rm2 Exception in thread "main" java.lang.UnsupportedOperationException: RMHAServiceTarget doesn't have a corresponding ZKFC address at org.apache.hadoop.yarn.client.RMHAServiceTarget.getZKFCAddress(RMHAServiceTarget.java:51) at org.apache.hadoop.ha.HAServiceTarget.getZKFCProxy(HAServiceTarget.java:94) at org.apache.hadoop.ha.HAAdmin.gracefulFailoverThroughZKFCs(HAAdmin.java:311) at org.apache.hadoop.ha.HAAdmin.failover(HAAdmin.java:282) at org.apache.hadoop.ha.HAAdmin.runCmd(HAAdmin.java:449) at org.apache.hadoop.ha.HAAdmin.run(HAAdmin.java:378) at org.apache.hadoop.yarn.client.cli.RMAdminCLI.run(RMAdminCLI.java:482) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84) at org.apache.hadoop.yarn.client.cli.RMAdminCLI.main(RMAdminCLI.java:622) {code} I'm thinking the above message is confusing to users. (Users may think whether ZKFC is configured correctly...) The command should output error message to stderr instead of throwing Exception. -- This message was sent by Atlassian JIRA (v6.3.4#6332)